Fancy Buying B31N1912 Laptop Battery for ASUS VivoBook

Compact 3‑cell polymer replacement battery built to restore runtime for many ASUS VivoBook 14 and 15.6" laptops.

If your ASUS VivoBook is powering down early or showing battery errors, the Fancy Buying B31N1912 (also labeled C31N1912) offers a direct-fit replacement. It delivers 11.55 volts and 42Wh capacity in a slim black pack that matches the original battery's shape and connector layout. The kit includes the battery, a simple installation tool, and a user manual so you can swap it without specialist equipment.

Which ASUS models will this battery work with?

This battery is designed for a wide range of VivoBook 14 and 15 models, including E410, L410, F414, E510, L510, R522 and compatible sub‑series. Check the replacement part numbers and your laptop's model label before ordering to ensure compatibility. It replaces OEM part numbers such as B31N1912 and C31N1912 and several vendor SKUs listed below.

• Replacement part numbers: B31N1912, C31N1912, 0B200-03680000, 0B200-03680100, 0B200-03680200
• Fits series: VivoBook 14 E410 / E410MA, L410 / L410MA, F414 / F414MA, VivoBook E510 / L510 / R522MA
• Compatible OEM SKUs: L510MA-WB04(DF112), L410MA-BV058TS, E410MA-EK017TS, E510KA-EJ033TS

How long will this battery last and what are the specs?

The B31N1912 is a polymer (Li‑Po) pack rated 11.55V and 42Wh, formed from three cells. Actual runtime depends on your laptop configuration and usage — lighter tasks yield longer battery life than heavy multitasking or gaming. The pack is built to the same voltage and connector pattern as the original, so performance mirrors the OEM battery under comparable conditions.

• Type: Lithium polymer (Li‑Po); Voltage: 11.55V; Capacity: 42Wh
• Cells: 3‑cell construction for compact fit and balanced weight
• Package includes: 1× B31N1912 battery, auxiliary installation tool, user manual

Is installation difficult and what safety steps should I follow?

Installation is straightforward for users comfortable opening a small laptop compartment; the included tool and manual guide the process. Always power down, unplug, and ground yourself to avoid static damage before starting. If you are unsure, seek a technician to avoid damaging connectors or voiding any remaining warranty.

• Power off and disconnect AC adapter before removing the old battery
• Use the provided tool and follow the step‑by‑step manual to avoid connector strain
• Dispose of the old battery at a local battery recycling facility

What warranty and return options come with this battery?

Fancy Buying backs this battery with a 60‑day return window and a 12‑month replacement policy. If you encounter compatibility issues or defects, contact the seller via the store's "ask a question" link promptly — returns close one month after delivery per the stated policy. Keep order details and photos of the installation if you file a claim.

• Return window: 60 days for returns; note the seller's one‑month closure condition after receipt
• Replacement warranty: 12 months from purchase for defects and failures
• How to get support: contact Fancy Buying via the store "ask a question" link

Who is this for? The Fancy Buying B31N1912 battery is aimed at VivoBook owners whose original battery no longer holds adequate charge or who need a cost‑effective OEM‑compatible replacement. It's ideal for students, remote workers, and light‑to‑moderate users who want a straightforward swap with clear instructions and a one‑year replacement safety net.